Hot-air furnace.



Patented Apr; 23, I90I.

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ation/m No. 672,845. Patented Apr. 23, |90I. P. W.- BEECH.

HOT AIR-FURNACE.

' (Application led Feb. 2, 1900.)`

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No. 672,845. Patented Apr. 23, 190|.

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No. 672,845. PatentedApr. 23, 190|.

P. W. BEECH.

HUT AIR FURNACE'.

(Application led Feb. 2, 1900.)

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No. 672,845'. Patented Apr. 23, |901.

` P. w. BEECH.

. HUT AIR FURNACE.

(Applicaeian ined Feb. 2, 1909.)

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' nl n UNITED STATES PATENT Orricn.`

PAUL W. BEECH, OF vMEMPHIS, TENNESSEE, ASSIGNOR OF TWO-THIRDS TO WILLIAM K. BURTON ANDYTHOMAS L. JONES, OF SAME PLACE.

HOT-AIR FU RNACE.

SPECIFICATION forming part of Letters Patent No. 672,845, dated April 23, 1901.

` Application filed February 2, 1990. Serial No. 3,736. (No model.)

'To all whom it may concern: tion, partly in section, of the modified con- Be it known that I, PAUL W. BEECH, acitistruction shown in Figs. 8, 9, and l0. zen of the United States, residing at Memphis, In the construction shown in Figs. 1 to 7, in the county of Shelby and State of Tennesinclusive, the reference-numeral 1 designates 55 5 see, have invented certain new and usefullm-r the bottom plate of the furnace, provided on provements in Hot-Air Furnaces,of which the its under side with transverse ribs 2, consistfollowing is a specification. ing of an gle-irons riveted to the bottom plate.

My invention relates to hot-air furnaces; The shell or casing of the furnace consists of and its primary object is to providea furnace an upper dome-shaped section 3 and a lower 6o 1o so constructed as to secure the maximum rasection 4, the latter being beveled outward diation of heat from the vfuel employed. at its opposite sides and rear end, as shown Furtherobjects of the invention are to pre-v at 5, 6, and 7, to form combustion ducts or vent cracking or buckling of the shell'or caspassages along the sides and back of the fur ing of the furnace caused by expansion and nace. The meeting edges of the two sections 65 15 contraction, to construct the shell or casing 3 and 4 are securely connected by meansof of a furnace in sections to facilitate its being oppositely-disposed angle-bars 8 and 9. The set up for use, said sections being so convertical flanges of thesel angle-bars are rivnected as to be thoroughly dust=proof and eted to the sections, and the horizontal flanges gas-proof, to provide means for aiording a thereof are firmly bolted together, as clearly 7o zo direct draft for starting the fire, and genershown in the drawings. The joints between ally to so improve the construction of furthe edges of the sections may be suitably naces of the class above named as to increase packed with reproof packing to effectually their durability and heating capacity. preventthe escape of gases.

An important characteristic of the inven- 10 and 1l designate the auxiliary side com- 75 25 tion is the employment of supplemental rabust-ionorradiatorchambers,whichareofoval' diator-chambersarranged at the sides and form in cross-sectionandextendfromthefront rear of the main combustion-chamber. to af- Wall of the shell or casing to a point beyond ford a greatly-increased radiating-space for the rear Wall thereof. These auxiliary side I the flame and productsof combustion and to radiators are secured to and communicate 8o 3o effect a more thorough combustion of the withthelowersectionlof the casing by means gases. of elbow-pipes, each comprising two sections The construction ofv the improved furnace 12 and 13, formed with anunlar flanges 14., se- Will be fully described hereinafter and decured together by bolts l5. The lower ends of fined in the appendedv claims in connection the elbow-sections 12 are formed with flanges 85 3 5 with the accompanying drawings, which form 16, which are bolted to the beveled sides 5 and Y a part of this specification, and in which- 6 of the lower section of the casing.

Figure lis a rear elevation 'of a furnace 17 designates a rear auxiliary radiator, embodying the invention. Fig. 2 is a side which may be of any suitableconstruction, elevation of the same, partly in section. Fig. but preferably of polygonal shape, and is con- 9o 4o 3 is a front elevation of the furnace. Fig. 4. nected by an elbow-pipe connection 18 to the is a vertical longitudinal section on the line rear beveled portion 7 of the casing. The 4. 4 of Fig. 5. Fig. 5 is a tranverse vertical ends of the elbow 18 are formed with flangesl section on the line 5 5 of Fig. 2. Fig. 6 isa 19 and 20, the iiange 19 being bolted to the longitudinal vertical section on the line 6 6 beveledend portion 7'and the iiange 20 se- 95v 45 of Fig. 1. Fig. 7 is a transverse vertical seccui-edv to a depending squared collar 2l by tion on the line 7 7 of Fig. 2. Fig. 8 is a lonangle-bars 22, bolted to the collar2l and flange gitudinal section of a modified construction 20. The rear radiator 17 communicates with` of the furnace. Fig. 9 is a transverse vertithe side radiators by means of telescoping cal section on the line 9 9 of Fig. 3. Fig. 10 flanged pipes 23 and 24, bolted, respectively, Ioo

5o is a longitudinal vertical section on the line to the inner sides of the radiators 10 and 1l l0 10 of Fig. 9; and Fig. 1l is a side elevaand the opposite sides ofthe rear radiatorand secured together by suitable bolts 25. As shown in Fig. 7, the side radiators are supported by brackets 26 and 27, projecting from opposite sides of the furnace shell or casing, the upper ends 28 of said brackets being hollowed out to conform to the oval contour of the radiators.

29 designates the front of the furnace, formed at about its center with a fuel-opening 30, communicating by means of a passage 31 with the fire-box of the furnace. Below the fuel-opening 30 is an opening 32, communicating by a passage 33 with the interior of the fire-box, and below the opening 32, near the lower edge of the front 29, is an opening 34, communicating by a passage 35 with the ash-pit of the furnace.

36 and 37 designate openings in the furnacefront, on opposite sides thereof, communicating by pipes 38 with the interior of the side radiators l0 and l1, and near the lower edge of the furnace-front, on opposite sides of the opening 34, are openings 39 and 40, communicating by pipes 41 with the draft-passages 42, which communicate with the elbow-pipes of the side radiators.

43 designates a collar secured centrally to the upper end of the rear radiator for the attachmentl of a smoke-pipe.

44 and 45 designate, respectively, front and `rear hollow walls, arranged within the lower sect-ion 4 of the casing and adjacent to the opposite sides thereof to form the side combustion ducts or passages 42. The front walls 44 are separated from the rear walls 45 by the vertical transverse end partitions or walls 46 and 47 of the hollow walls. The bottoms of the walls 44 are formed with air-inlets 48, and the rear hollow walls 45 are also provided with air-inlets 49. The spaces 50 within the rear hollow walls 45 constitute the receiving-cham bers for the air to be heated, and the air after being heated escapes to the hot-air-circulating pipes through openings 5l, surrounded by collars 52. The upper sides 53 of the hollow walls are oppositely beveled and formed with depending flanges 54, which engage or interlock with angle-brackets 55, secured to the inner sides of the casing.

56 and 57 designate angle-clamping plates fitting over the beveled upper ends of the hollow walls and extending inwardly beyond said walls to overlap the top edges of the firebrick lining 58 of the fire-box 59. The inner sides of the walls 44 and 45 are provided with flanges 60 to support the fire-brick lining 58 and grate 6l. The clamping-plates 56 and 57 are formed with slots through which project loops or eyes 62, formed in the walls 44 and 45 and adapted to receive wedges 63 to secure the clamping-plate firmly in place.-

64 designates a transverse wall located Within the lower section of the shell or casing and separating the fire-box from the main combustion-chamber 65.

The spaces between the upper beveled edges of the hollow walls 44 and 45 and the vrations 67 of the hollow wall 44 to circulate below the clamping-plate and pass through perforations 68 of the clamping-plates into the contents of the tire-box.

To the front side of the transverse wall 64 is secured by bolts 69 a flanged plate 70, the lower end of which overlaps the rear lining of the fire-box.

The lower edge of each of the hollow walls 44 is secured by a groove or channel formed by oppositelydisposed angle-plates 7l, secured to the bottom plate of the furnace.'

The cross-Wall 64 is formed on its rear side with vertical reinforcing-ribs 72 to impart rigidity and on its front side below the grate with vertical ribs 73 to support the firelbrick and grate-rests at the bottom of the fire-box.

The union of the plate with the crosswall 64 forms a chamber 74 for the circulation of hot air entering through the ducts 67 and space 66 for the protection of the metal and for discharge through perforations 75 over the fire or into the combustion-chamber to promote combustion of the gases which usually escape as waste products through the smoke-lines.

Within each of the side radiators l0 and 11 I arrange a vertical deflector-plate 76, said plate being located centrally between the ends of the radiators and serving to arrest and deiiect the current of flame, dac., to secure a more thorough diffusion thereof. The rear radiator is also provided with vertically-disposed parallel division-plates 77 to direct the incoming currents of heat and fiame do-wnward and then upwardto the discharge-flue, as illustrated by arrows in Fig. 7. The entrance to the rear radiator is controlled by a suitable damper 78.

In Figs. 8, 9, 10, and 11 I have shown a modified construction ofthe furnace, in which is employed a smoke-chamber 79, located at the rear of the main combustion-chamber and firmly secured thereto. The front wall of the cham ber 79 is provided with a removable shield comprising a metal plate 80, provided at its upper side with ahook-fiange 8l, interlocking with a similar but oppositely-disposed fiange 82, projecting from the casing of the chamber 79. The side radiators 10a and 11a communicate with the smoke box or chamber 79, as shown at 83. The shield 80 protects the casing from undue heating, and the chamber 79 receives the dying products of combustion from the radiators and discharges them into the smoke-Hue. The chamber 79 is provided with an opening 84,closed by a damper 85, which permits the soot and ashes to be discharged to the bottom of the furnace for removal through the door provided for the purpose at the front of the furnace. The damper also serves to provide a direct draft from the fire-box to the smoke-flue in starting the fire or when only a small amount of heat is required. The form of side radiators IOO IIO

comprising upper and lower sections detach ably secured together the upper section being of rounded or dome shape, and the lower section being outwardly beveled; in combination with side and rearradiators, communicating with the casing by pipes entering the beveled portions of the lower section.

2. In a hot-air furnace, a shell or casing comprising sections detachably secured together, the lower section being -outwardly beveled; in combination with vertical hollow walls, located within the beveled section of4 the casing to form therewith side ducts for the products of combustion; side radiators communicating with said side ducts; and a rear radiator communicating with the side radiators, and with the main combustionchamber of the furnace. f

3. In a hot-air furnace, the combination with a sectional shell or`casing, of verticallydisposed hollow walls, forming with said shell side combustion-ducts; side radiators communicating with said combustion-ducts; and a rear radiator communicating with the side radiators and the shell or casing.

4. In a hot-air furnace, the combination with a shell or casing beveled outward at opposite sides, of horizontally-alined hollow walls, having airinlets andoutlets; sideradiators communicating with the shell or casing and a rea-r radiator communicating with the side radiators and the shell or casing, the flue connections of said radiator joining the beveled portions of the casing.

5. In a hot-air 1furnace, the combination with a shell or casing, of hollow walls within the casing located a sufficient distance from the sides thereof to form therewith ducts or passages; a {ire-box between the hollow Walls and clamping-plates detachably secured to the uppe'r sides of the hollow walls for securing the lining of the fire-box.

6. In a hot-air furnace, the combination with a shell or casing beveled outwardly at opposite sides, of hollow walls arranged within the casing adjacent to the sides thereof to form therewith side passages for the products of combustion; side radiators communicating with said passages, and with the upper portion of the casing; aine-box disposed between the hollowv walls and clalnpingplates arranged above the hollow walls and overlapping the lining of the fire-box.

7. In a hot-air furnace, the combination with the shell or casing, of hollow walls arranged adjacent to the Asides of the casing, 'and secured thereto at their lower ends by flanged plates, and at their upper ends by interlocking flanges; clamping-plates detachably secured above the upper ends of the hollow walls with air-spaces between said plates and walls; and air-inlets in the walls and plates.

8. In a hot-air furnace, the combination with a shell or casing, of side radiators communicating with the casing, a smoke box or chamber within the upper portion of the shell or casing communicating with the upper portion of the side radiators; and a'removable plate or shield for said smoke-box.

9. In a hot-air furnace, the combination with a shell or casing, of side radiators con nected with the casing; a smoke box or chamber Within the upper portion of the shell or casing communicating with the side radiators; a removable plate or shield for said smoke-box, and a damper at the bottom of said smoke-box.

In testimony whereof I affix my signature in presence of two witnesses.

PAUL W. BEECH.

Witnesses:

WM. G. LEA, E. H. MILLER. 

